Finding the Fourth Proportional to 3,934.16, 5,428.89 and 2,165.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,934.16 : 5,428.89 = 2,165.42 : x
2. Step 2: Convert to fraction form
   3,934.16/5,428.89 = 2,165.42/x
3. Step 3: Cross multiply
   3,934.16x = 5,428.89 × 2,165.42
4. Step 4: Simplify right side
   3,934.16x = 11,755,826.98
5. Step 5: Solve for x
   x = 11,755,826.98/3,934.16
6. Step 6: Final answer
   x = 2,988.14